Hand tool with a shifting gear unit

Details Hand tool with a shifting gear unit Hand tool with a shifting gear unit

1989-12-08

1991-03-12

Phan, Hien H.

Tool driving or impacting

Drive adjustable to completely change kind of drive

173104, 173117, B25D 1100

Patent

active

049985884

ABSTRACT:
A hand tool has a shifting gear unit containing an output drive shaft. The drive shaft can be coupled with different gears by a connecting device so that a coupled gear drives the shaft. The connecting device is displaced by a slide and the slide is, in turn, displaced by a rotatable handle. Drive cams on the handle seat in engagement recesses in the slide. The drive cams and engagement recesses are spaced equal distances apart, so that as the handle is rotated, the drive cams, one after the other, entrain the engagement recesses and move the slide.

REFERENCES:
patent: 994627 (1911-06-01), Workman, Sr.
patent: 3828865 (1974-08-01), Schnizler, Jr.

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